* {
  margin: 0;
  padding: 0;
}

.box {
  width: 100vw;
  height: 100vh;
  background-color: #ccc;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.box form {
  padding: 20px;
}
.box input,
.box button {
  margin-bottom: 10px;
}
